noun

• Any of several flightless sea birds, of order Sphenisciformes, found in the Southern Hemisphere, marked by their usual upright stance, walking on short legs, and (generally) their stark black and white plumage.
• (obsolete or historical) An auk (sometimes especially a great auk), a bird of the Northern Hemisphere.
• (slang) A nun.
• (juggling) A type of catch where the palm of the hand is facing towards the leg with the arm stretched downward, resembling the flipper of a penguin.
• A spiny bromeliad with egg-shaped fleshy fruit, Bromelia pinguin.
• (UK, military, slang) A member of the air force who does not fly aircraft.